3-(substituted) sulphonyl-5-alkanoyliminodibenzyls useful in the preparation of derivatives of dibenz [b, f] azepines



United States Patent s sUssrrrU'rnmsUiriioNYL s ALKANoYn IMINODIBENZYLS USEFUL IN THE PREPARA- TION or DERIVATIVES or mannztar azr- PINES Henri Dietrich and Werner Kiing, Basel, Switzerland, assignors to Geigy Chemical Corporation, Ardsley, N.Y., a corporation of Delaware No Drawing. Filed Apr. 6, 1962, Ser. No. 185,519 Claims priority, application Switzerland, Apr. 8, 1961,

4,159/61, 4,160/61 6 Claims. (Cl. 260239) The present invention concerns novel intermediates for the preparation of new N-heterocyclic compounds which have valuable pharmacological properties.

More specifically, the invention relates to intermediates useful in the preparation of new derivatives of dibenz[b,f] azepines, namely iminodibenzyl derivatives substituted by a disubstituted sulphamoyl group, i.e. compounds of the R and R represent lower alkyl radicals which can be bound to each other direct or by way of an oxygen atom,

Z represents a straight chained or branched chained alkylene radical having 26 carbon atoms, and

Am represents a lower alkylamino or di(lower)alkylamino group and wherein a lower alkyl radical of Am can be bound direct with the alkylene radical Z or both lower alkyl radicals of a di(lower) alkylamino group Am can be found to each other direct or by way of an oxygen atom, an imino group, a lower alkylimino, hydroxy (lower)alkylimino or lower alkanoyloxyflower)alkylimino group as well as their non-toxic acid addition salts, which compounds have valuable pharmacological properties, for example spasmolytic, antiallergic, antiemet-ic, serotonin-antagonistic and reserpine-antagonistic activity.- In addition they modify the action of other pharmaceuticals, in particular, of anaesthetics e.g. 2-methoxy-4- allylphenoxyacetic acid diethylamide.

In the compounds of the Formula I, the term lower means radicals having from 1 to at most 4 carbon atoms, e.g. methyl, ethyl, propyl, isopropyl etc. Therein R and R represent, for example, methyl, ethyl, n-propyl or n-butyl radicals or, together with the adjacent nitrogen atom, they form, for example, the l pyrrolidinyl, piperidino or 4-morpholinyl radical. Z is, for example, an ethylene, propylene, trimethylene, l-methyl-trimethylene, Z-methyl-trimethylene or tetramethylene radical and Am is, for example, a methylamino, ethylamino, n-propylamino, isopropylamino, n-butylamino, dimethylamino,

methylethylamino, diethylamino, methyl-n-propylamino, methyl-isopropylamino, di-n-butylamino, diisobutylamino, l-pyrrolidinyl, piperidino, hexamethyleneimino, 4- morpholinyl, l-piper azinyl, 4-methyl-1-piperazinyl, 4-isopropyl-l-piperazinyl, 4-(B-hydroxyethyl)-1-piperazinyl, 4- (fl-acetoxy-ethyl)-l-piperazinyl or 4-,B-hydroxypropyl lpiperazinyl radical. In addition, Am together with Z can represent, e.g. the ,B-(l-methyl-Z-pyrrolidinyl)-ethyl, 1- methyl-3-pyrrolidinylmethyl, 18-(l-methyl-2-piperidinyl)- ethyl, 1-methyl=3 piperidinylmethyl or 1-methyl-4piperidinyl radical.

Compounds I are disclosed and claimed in a copending application.

One process for the production of compounds of the 3,192,197 Patented June 29, 1965 ice Formula I consists in reacting, in the presence of a basic condensing agent, a compound of the Formula V i H (v) wherein R and R have the meanings given above, with a reactive ester of an aminoalcohol of the Formula VI,

HO-ZAm (VI) wherein Am has the meaning given above for Am with the exception of a lower alkylamino group, and Z has the meaning given above.

Examples of starting materials of the Formula V are 3-dimethylsulphamoyl-iminodibenzyl, 3 diethylsulph-amoyl iminodibenzyl, 3-piperidinosulphonyl iminodibenzyl and 3-(4'-morpholinyl)-sulphonyl-iminodibenzyl. These and other homologous and isomeric compounds are ob tained, e.g. starting from 3-amino-5-acetyl-iminodibenzyl by converting this into the corresponding diazonium chloride and treating the latter, in acetic acid after addition of copper-II-chloride, with sulphur dioxide, precipitating the 3-chlorosulphonyl-5-acetyl-iminodibenzyl by dilution with water and reacting with a suitable lower dialkylamine, with piperidine or morpholine and, final-1y, splitting off the acetyl radical by partial hydrolysis by means of ethanolic or methanolic potassium hydroxide solution.

As reactive esters of aminoalcohols of the Formula VI, the halides in particular are employed, as tag. the chlorides, bromides or iodides; individually can be named:

p-dimethylamino-ethyl chloride, fi-diethylamino-ethyl chloride, fi-methylethylamino-ethyl chloride, p-dimethylamino-propyl chloride, B-dimethyiamino-isopropyl chloride, y-dimethylamino-propyl chloride, -dimethylamino-butyl chloride, fi-dimethylamino-butyl chloride, 'y-d'imethylamino-B-methyl-propyl chloride, ot-methyl-y-dimethylamino-n-amyl chloride, 18- di-n-propylamino) -ethyl chloride,

18- (methyl-isopropylamino -ethyl chloride, ,8- (di-n-butylamino -ethyl chloride,

' S-(diisobutylamino) -ethyl chloride,

as well as the corresponding bromides and iodides, as well as the corresponding alkaneand arysulphonic acid esters.

The following example further illustrates the production of new compounds of Formula 1. Parts are given therein asparts' by weight and their relationship to parts by volume is as that of grammes to cubic centimetres. The temperatures are in degrees Centigrade.

30.2 parts of 3-dimethylsulphamoyl-iminodibenzyl are dissolved in 900 parts by volume of abs. xylene, 4.3 parts of sodium amide pulverised in toluene are added and the whole is stirred for 2 /2 hours at 120. v-Dirnethylamino-propyl chloride (liberated from 16-parts of the hydrochloride and taken up in xylene) is added and the whole is refluxed for 19 hours. After cooling, the reaction mixture is extracted with 2 N hydrochloric acid, the reaction product is. then liberated with N caustic soda lye and taken up in ether. After drying the solution and evaporation off of the ether, an oil remains which, on standing for a considerable time, crystallises. Recrystallised from petroleum ether, the pure 3-'dimethylsulphamoyl-S-(v-dimethylamino-propyl) iminodibenzyl melts at 6668.

With ='y-diethlamino-propyl chloride in the place of 'y-dimethylamino propyl chloride, 3-dimethylsulphamoyl- 5-(' -diethylamino-propyl)-iminodibenzyl is obtained in a "similar manner.

3-piperidinosulphonyl S-dimethylamino-propyl-irninodiben zyl is obtained in an analogous manner from 3-piperidinosulphonyl-imino-dibenzyl and 'y-dimethylaminopropyl chloride; Recrystallised .f-rom cyclohexane, it melts at 109.

3-(4'-morpholinyl) r-sulphonyl 5-('y-dimethylamino-' propyl)-imino-dibenzyl, produced analogously to the above example from 3-(4-morpholinyl)-sulphony1 i'minodibenzyl and dimethylamino-propyl :chloride, melts at 132-433. The hydrochloride melts at 201-203".

3-diethylsulphamoyl 5-('y-dimethylamino-propyl) -im-. inodibenzyl is obtained in an analogous manner from 3- diethylsulphamoyl-iminodibenzyl and 'y-dimethylaminopropyl chloride.

In' analogous manner from 3-(4'-morpholinyl-)-sul-. phonyl-iminodibenzyl and N-methyl piperidyl-Z-ethyl chloride, 3- (4'-morpholinyl -sulphonyl-5-N-methyl-piperidyl-2-ethyl-iminodibeniyl is obtained. Its hydrochloride retains 1 mol of crystal water and melts at 211-2125".

The 3-piperidinosulphonyl 5-(N methylpiperidinyl-ZZ ethyl)-iminodibenzyl hydrochloride monohydrate, produced in an analogous manner, melts at 165-167".

In its principal aspect, this invention relates to the new intermediate products, corresponding to subsequent Formulae'IX, X and XII, for the preparation of substances having valuable pharmacological properties as described in the preceding portion of this disclosure. New compounds, which can be used also asantioxidants, and which are illustrated by Formula XII and the following Forwherein R and R independently represent lower alkyl radicals which can be bound to each other direct or by Way of an oxygen atom, can be prepared by converting a 3-amino-5-acyl-iminodibenzyl, particularly 3-arnino-5- acetyl-iminobenzyl, into the corresponding diazonium chloride, treating the latter with sulphur dioxide to form the new intermediate chlorosulphonyl compound of the Formula X CHFCHZ I N sot-o1 wherein: R represents an acyl radical, e.g. the acetyl radicalor another lower alkanoyl radical, and reacting the chlorosulphonyl compound (Formula X) with an amine of the general Formula XI GHFCHZ S Oz-N it (XII) i.e. while retaining the sulphonamido group to the compound of the Formula IX.

Inthe compounds of-the Formula IX and the starting and intermediate products (of the Formulae X, XI and XII) for the production of same. The term lower means radicals having from 1 to atmost 4 carbon atoms, e.g. methyl, ethyl, propyl, isopropyl etc. Each of R and R independently represents, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl or isobutyl radicals. Together with the adjacent nitrogen atom they can represent, e.g. a pyrrolidinyl-(l), piperidino or 4-morpholinyl radical. The acyl. radical R in Formulae -X and XII is preferably an acetyl radical, but it can also be another lower alkanoyl radical such as the propionyl or butyryl radical or a lower carbalkoxy radical.

To convert the 3-amino-S-acyl-aminodibenzyls into 3-chlorosulphonyl-iminodibenzyls, first the corresponding diazonium chloride solutions are prepared in the usual way, and these are poured into glacial acetic acid to which copper-II-chloride has been added and which has been saturated with sulphur dioxide. Sulphur dioxide is then introduced until no more nitrogen is liberated. The chlorosulphonyl compounds of the Formula X can be liberated, e.g. by dilution of the reaction mixtures with ice and water. The reaction with amines of the Formula X1 is preferably performed in an inert organic solvent such as, e.g. acetone, at room temperature (about 20 C.) to boiling temperature. Thev amines to be reacted can be added, e.g. as such or as concentrated aqueous solutions. Advantageously an excess of amine serves as acid binding agent. The 3-sulpharnoyl-i-acyl-iminodibenzyls are partially hydrolysed advantageously in an alkaline medium, eg with ethanolic or methanolic potassium or sodium hydroxide solution.

Compounds produced according; to this aspect of the invention and corresponding to those of Formula IX can be reacted, for example in the'presence of sodiumamide in an inert organic. solvent, with for example lower dialkylamino alkyl chlorides such as 'y-dimethylamino propyl chloride to form the corresponding S-dialkylaminoalkyl derivatives particularly useful onaccount of their serotoninand reserpine-antagonistic properties; with for example 'y-dimethylamino butyl chloride or ,6-(1'-methyl-2'-piperidinyl)-ethyl'chloride to form derivatives of interest in particular because of their spasmolytic properties, for example with lower cc,w-dihal0 alkanes, followed by l-lower alkyl-' or 1-(hydroxyloweralkyl)- piperazine to form piperazinyl derivatives of particular value because of their antiemetic properties. I

Particularly advantageous intermediate compounds according to this second aspectv of theinvention are compounds of the formulae suction and recrystallised from ethanol.

UHF-CH2 I /Rt 1 R2 and ' oar-om 1 S OzN it wherein R and R are independently lower alkyl, and

R and R when taken together with the adjacent nitrogen represent piperidino and 4-morpholinyl, and

R is acyl, preferably acetyl.

The following example further illustrates the production of new compounds of Formulae IX, X and XII according to this aspect, but is by no means the sole method of performing the process according to the invention. Parts are given therein as parts by weight; their relationship to parts by volume is as that of grammes to cubic centimeters. The temperatures are in degrees centigrade.

Example 2 (a) 252 parts of 3-amino-S-acetyl-iminodibenzyl are dissolved in 50 parts by volume of concentrated hydrochloric acid and 150 parts by volume of water. On cooling and stirring, the hydrochloride crystallises out in a fine form. 7 parts of solid sodium nitrite are added to the ice-cooled suspension which is then stirred until a clear solution is obtained. The solution is then added to 500 parts by volume of glacial acetic acid to which have been added 3 parts of copper-(ID-chloride and which has been saturated with sulphur dioxide. Nitrogen development begins immediately and, on continuous- 1y introducing sulphur dioxide, is concluded after about 1 hour. The reaction mixture is diluted with ice and water whereupon the chlorosulphonyl compound crystallises and'can be filtered off. The crude product is purified by dissolving in benzene and precipitating with petroleum ether or by recrystallising from a little benzene. The 3-chlorosulphonyl-S-acetyl-iminodibenzyl then melts at 173.5-174.

(b) 33.58 parts of 3-chlorosulphonyl-S-acetyl-iminodibenzyl are dissolved in200 parts by volume of acetone and 200 parts by volume of 40% aqueous dimethylamine solution are added. On heating for a short time at 55 and then concentrating, .a crystal slurry is obtained to which water is added. The crystals are filtered off under The 3-dimethylsulphamoyl-S-acetyl-iminodibenzyl melts at 151".

(c) 34.4 partsof 3-dimethylsulphamoyl-5-acetyliminodibenzyl and 20 parts of potassium hydroxide in 300 parts by volume of alcohol are refluxed for 8 hours. After concentrating and diluting with ice water, the crude product can be filtered off. Recrystallised from ethanol, the pure 3-dimethylsulphanomyl-iminodibenzyl melts at 140.

The following compounds, for example, are produced by reaction with the corresponding amine in an analogous manner:

What is claimed is: 1. 3-(4-morpholinyl)-sulphonyl-iminodibenzyl. 2. An iminodibenzyl of the formula CHFCHS N/Ri so in which I R and R are independently lower alkyl and R and R when taken together with the adjacent nitrogen is a member selected from the group consisting of piperidino and 4-morpholinyl, and R is lower alkanoyl. 3. 3-piperidinosulphonyl-S-acetyl-iminodibenzyl. 4. 3-(4-morpholinyl) sulphonyl 5 acetyl iminodibenzyl.

5. An iminodibenzyl of the formula CHz-GEz in which R is lower alkanoyl.

6. 3-chlorosulphonyl-S-acetyl-iminodibenzyl.

References Cited by the Examiner UNITED STATES PATENTS 2,554,736 5/51 Haefiiger et a1. 260239 2,894,947 7/59 Jacob et al. 260-243 2,928,767 3/60 Gulesich et a1 260243 2,981,736 4/61 Gailliot et al. 260239 3,016,373 1/62 Saggiomo et a1. 260239 OTHER REFERENCES Hollister: Ann. of Internal Medicine, volume 51, No.

5, pages 1040-41 (1959).

Lehmann et al.: Canadian Psychiatric Assoc. Jour., volume 3, No.4, pages -63 (1958).

Schindler et al.: Helv. Chim. Acta, volume 37, 1954, pages 472-83.

Villani et al.: Jour. of Med. and Pharrn. Chem, volume 5, No. 2, pages 373-83 (1962).

IRVING MARCUS, Primary Examiner.

WALTER A. MODANCE, Examiner. 

1. 3-(4''-MORPHOLINYL)-SULPHONYL-IMINODIBENZYL.
 2. AN IMINODIBENZYL OF THE FORMULA
 5. AN IMINODIBENZYL OF THE FORMULA 